"To receive EM energy you need a structure that's a substantial fraction of the wavelength." The axons of nerve cells are millimeters to meters long. It's als

"To receive EM energy you need a structure that's a substantial fraction of the wavelength." The axons of nerve cells are millimeters to meters long. It's also an open question just how sensitive neurological processes are to externally applied voltage. Neurons are polarized to about 50 mV, so a noisy oscillator composed of neurons could be measurably affected by a few millivolts of imposed potential. Fortunately it would be a statistical effect of similar magnitude to dietary changes or mechanical vibration, so the health effects would be microscopic. "It most certainly can." Stick a neon bulb in a microwave oven. The result is spectacular ionization resulting in bulk plasma formation, via nonthermal effects. And before you complain, certain proteins have a highly-hydrophobic cavity that does a remarkable impersonation of a vacuum chamber, and which would tend to accumulate noble gases. The actual argument against this being a problem is not Sci Am's half-assed physics theory but practical data. Many people have implanted pacemakers and nerve stimulators that apply substantial electrical potentials to living tissues: muscle, peripheral nerves, even the brain itself. No apparent pathology results over thousands of patient years of intensive use.